Invasion

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    Keywords: MiddleGame

An invasion (Japanese: uchikomi) is a play made inside an enemy framework with the intention of living or escaping.

[Diagram]

Invasion example from a joseki

If after Black's kosumi B2 White makes a three-space extension to W3, with the idea of having a good shape after the Black a-White b, exchange, Black instead plays an invasion B4.

See also Invading an enclosure, Invasions on the side and 3-3 Point Invasion.

See also Invasion Itinerary.


Invasions occur throughout the game.

The difference between the second and third cases is that invasions in the middle game phase may create weak groups; which have no place in the endgame, where everything in theory is already settled in status and there is nowhere much to run.


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This is a copy of the living page "Invasion" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.
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